Coming soon
Open any file online. Free, right in your browser.
FileExtension.org has been around since 2013, helping people figure out unknown file extensions and find the right software to open them. Now we're rebuilding it as a set of free online tools that open, view and convert files without installing anything.
2013
The file extension library
An A–Z guide to file formats and the programs that open them.
Today
A complete rebuild
New design, new engine, built for every device.
Coming soon
Free online file tools
Open, view and convert files right in your browser.
100% free
Every tool, free to use. No trials, no sign-ups.
Nothing to install
Works online on any computer, tablet or phone.
Hundreds of formats
Documents, images, archives, data files and more.